<nz-tabset [nzType]="'card'">
  <nz-tab nzTitle="邮件配置">
    <app-email-config-tab></app-email-config-tab>
  </nz-tab>
  <nz-tab nzTitle="邮件发送">
    <app-email-send-tab></app-email-send-tab>
  </nz-tab>
</nz-tabset>
